Tìm x, y thuộc Z biết x - 7/ y - 6 = 7/6 và x - y = -4
tìm x y thuộc n biết (x-1)(y+3)=6
tìm các số tự nhiên x biết 1/5<x/30<1/4
\(\text{Tìm x, biết:}\)
\(20\text{%}x-x+\dfrac{1}{5}=\dfrac{3}{4}\)
Tìm x, y ∈ Z biết
1/ ( x - 1 ) ( x - 2 ) ≤ 0
2/ ( 2 x - 4 ) ( 2 x - 10 ) < 0
3/ ( x2 + 1 ) ( x2 - 4 ) < 0
4/ ( x2 - 7 ) ( x2 - 1 ) ≤ 0
5/ |x| + |x+1| = x + 2
6/ |x| + |x+1| + |x+2| + |x+3 |= 3x
tìm x,biết:
a)15.3-x=2.(x-4)
b)10-|3-x|=6.(-7)
c)(x-2).(2.y+1)=-6
Tìm x :
a) \(\left|x+\dfrac{11}{17}\right|+\left|x+\dfrac{2}{17}\right|+\left|x+\dfrac{4}{17}\right|=4x\)
b) \(\left|x+\dfrac{1}{2}\right|+\left|x+\dfrac{1}{6}\right|+\left|x+\dfrac{1}{12}\right|+\left|x+\dfrac{1}{20}\right|+..+\left|x+\dfrac{1}{110}\right|=11x\)
a) Tính A = ( 1 - \(\dfrac{1}{2}\) )( 1 - \(\dfrac{1}{3}\) ) (1-\(\dfrac{1}{4}\) ) ....(1-\(\dfrac{1}{2014}\) ) (1-\(\dfrac{1}{2015}\) ) (1-\(\dfrac{1}{2016}\) )
b)Tìm x biết \(\dfrac{x-2}{12}\) + \(\dfrac{x-2}{20}\) + \(\dfrac{x-2}{30}\)+ \(\dfrac{x-2}{42}\) + \(\dfrac{x-2}{56}\) +\(\dfrac{x-2}{72}\) = \(\dfrac{16}{9}\)